Tobacco pipes



TOBACCO PIPES Filed Dec. 20, 1960 7 1a F/G.2

4 46 4a 411 I ///L 6 8a 4b INVENTOR WI LLY HEFTI Y W PQW;

ATTDRNEYS United States Patent T 3,106,922 TQBACCG PIPES Willy Hefti, Route du Signal 12, Lausanne, Switzerland Filed Dec. 29, 1960, Ser. No. 77,101 Claims priority, application Switzerland Nov. 9, 1966 2 Claims. (Cl. 131-476) My invention has for its object a tobacco pipe including a bowl provided with a cover and a stem opening into said bowl.

According to my invention, said pipe stem includes a terminal section in the shape of a piston which allows the stem to be axially shiftabl'e inside the pipe bowl in a manner such that said stem may serve both for com pacting the tobacco in the bowl and for cleaning the latter.

I have illustrated in the accompanying drawings a preferred embodiment of my invention. In said drawings,

FIG. 1 is a side view of my improved pipe with the cover in its closed position,

FIG. 2 is a longitudinal cross-section of the bowl end of said pipe and a portion of the stem on a larger scale.

FIG. 3 is a cross-section through line Ill-III of FIG. 2, showing the cover in its open condition in broken lines.

The tobacco pipe according to FIGS. 1, 2 and 3 includes a pipe bowl 1 and a stem opening into said bowl. The stem is made up of two separate elements of which the element at the tree end forms a mouth-piece 2, while the element at the other end is constituted by a tubular member 3 threadedly engaging the mouth-piece rearrnost by means of screw threads 2a. The end of the tubular member 3 adjacent the bowl back is cylindrical in shape and has an enlarged head 3a slidable within the bowl and is provided with an annular metal scraper 4 fitted over the enlarged head of said tubular member. Said annular scraper includes a irusto-conical wall element the outer edge of which engages the inner cylindrical wall of the bowl 1. The scraper 4 is provided on the rear portion thereof with a plurality of elastic tongues 40 formed by the cutting of a plurality of longitudinal slots 4d in frustoconical collar section 4b, by means of which tongues said scraper snaps into engagement with the piston-shaped end of the tubular element 3 when said scraper is pressed into member 3 from the stem end thereof, said end being provided for this purpose with an annular groove 3b whereby the scraper is reliably secured to the stem in its operative position. The passage 6 opening into the bowl through which the tubular member 3 is adapted to pass flares forwardly and has a frusto-conical shape. The member 3 is provided adjacent the bowl end thereof with an outer peripheral annular groove in which is fitted an annular packing 7, preferably of rubber, providing a seal with the conical passage 6 as illustrated in FIG. 2.

The end of the mouthpiece 2 toward the bowl has a reduced cross-section and is adapted to carry a cap 8 which is fitted over it and which is provided with a lateral aperture 8a spaced from the mouth-piece element 2. Through the presence of said perforated cap, it is possible for the smoke to pass into the mouth-piece 2 only after deflection around said cap and through said aperture 8a.

The pipe bowl is provided with a cover 9 which allows the passage of air and which may be pivoted into its 3,l@b,922 Patented Oct. 15, 1963 closing position in which it engages a semi-circular slot formed in the pipe bowl 1 in a vertical transverse plane at the outer end of said pipe bowl (see FIG. 3). The cover 9 is provided vw'th a circular perforated central section 9a extending into an annular flange which is broader in one half of the cover than in the other. Said cover may pivot around a pivot 12 which is secured at a suitable point Lfaci-ng one end of the semi-circular slot 10 in a corresponding bore formed longitudinally in the wall of the bowl, said pivot extending through one end of the broader half of the annular cover flange.

The cover 9 is provided at a point of its periphery diametrically opposed to the pivot with an outwardly projecting grip 13 for pivoting the cover between its open and closed positions.

The operation of the above-described tobacco pipe is as follows: after the cover 9 has been opened, the cylindrical chamber of the bowl is filled with tobacco, the pipe stem or piston being drawn out. The cover is now closed again and the load of the tobacco can be compacted by urging the stem toward the bowl. After this compacting, the tobacco may be lit through the perforated closed cover. During the actual smoking, the tobacco may from time to time be compacted by a thrust exerted on the pipe stem. When the pipe has been smoked through, the cover 9 is opened and the ashes remaining in the bowl are urged out of the bowl by pushing the pipe stem toward the bowl.

When cleaning the bowl 1, it is suflicient to push the pipe stem toward the bowl to a point at which the scraper edge has swept over the inner surface of the bowl to the bottom to the semi-circular slot 10, said cleaning operation being executed repeatedly if required. Upon movement of the stem away from the bowl until the scraper 4 engages the shoulder 1a, the packing ring 7 is clamped between its seat in the tubular member 3 and the frustoconical wall of passage 6; a further bearing surface is provided by the points of engagement between the scraper 4 and the bowl 1, whereby the tubular member 3 is secured within the bowl.

What -I claim is:

l. A tobacco pipe comprising a bowl having a transverse slot in one end, a pipe stern slidable axially in the bowl, an annular scraper mounted on the portion of the stem sliding in the bowl, the other end of the bowl having a wall defining a passage through which the pipe stern passes, said passage being frusto-conical in shape and flaring toward the interior of said bowl and an adjacent portion of the stem having an annular groove therein, a sealing ring positioned in said groove in said stem and pressed against the trusto-conical passage wall of the bowl when the stern and the bowl are in their position of use, a grid mounted in the transverse slot of the bowl so as to be able, by a movement perpendicular to the sliding axis of the stem, to close or open the bowl, whereby when the bowl is closed by the grid, an axial sliding movement of the stern causes the compacting of the tobacco, whereas when it is open, as a result of the withdrawal of the grid, the same axial sliding movement of the stem causes the cleaning 'out of the pipe and the ejection of the tobacco ash.

2. A tobacco pipe comprising a bowl having a transverse slot in one end, a pipe stem having an enlarged head on one end in the bowl, said enlarged head being slidable axially in the bowl, an annular scraper mounted on the enlarged head, said scraper having a frusto-conical collar on the side of the enlarged head toward the bottom of the bowl and said collar having a plurality of longitudinal slots therein subdividing the collar into a plurality of tongues, the terminal portion of said one end of the pipe stem also having an annular groove therein adjacent said enlarged head, said tongues being engaged in said annular groove, a grid mounted in the transverse slot of the bowl so asto be able, by a movement perpendicular to the sliding axis of the stem, to close or open the bowl, whereby when the bowl is closed by the grid, an axial sliding movement of the stem causes the compacting of the tobacco in the pipe, Whereas when it is open, as a result of the Withdrawal of the grid, the same axial sliding movement of the stem causes the cleaning out of the pipe and the ejection of the tobacco ash.

References Cited in the file of this patent UNITED STATES PATENTS 

2. A TOBACCO PIPE COMPRISING A BOWL HAVING A TRANSVERSE SLOT IN ONE END, A PIPE STEM HAVING AN ENLARGED HEAD ON ONE END IN THE BOWL, SAID ENLARGED HEAD BEING SLIDABLE AXIALLY IN THE BOWL, AN ANNULAR SCRAPER MOUNTED ON THE ENLARGED HEAD, SAID SCRAPER HAVING A FRUSTO-CONICAL COLLAR ON THE SIDE OF THE ENLARGED HEAD TOWARD THE BOTTOM OF THE BOWL AND SAID COLLAR HAVING A PLURALITY OF LONGITUDINAL SLOTS THEREIN SUBDIVIDING THE COLLAR INTO A PLURALITY OF TONGUES, THE TERMINAL PORTION OF SAID ONE END OF THE PIPE STEM ALSO HAVING AN ANNULAR GROOVER THEREIN ADJACENT SAID ENLARGED HEAD, SAID TONGUES BEING ENGAGED IN SAID ANNULAR GROOVE, A GRID MOUNTED IN THE TRANSVERSE SLOT OF THE BOWL SO AS TO BE ABLE, BY A MOVEMENT PERPENDICULAR TO THE SLIDING AXIS OF THE STEM, TO CLOSE OR OPEN THE BOWL, WHEREBY WHEN THE BOWL IS CLOSED BY THE GRID, AN AXIAL 